im ‧ pres ‧ sion ‧ ist /ɪmˈpreʃ ə nəst, ɪmˈpreʃ ə nɪst/ BrE AmE noun [countable]
[ Word Family: noun : ↑ impression , ↑ impressionism , ↑ impressionist , ↑ impressiveness ; adjective : ↑ impressionable , ↑ impressive ≠ ↑ unimpressive , ↑ impressionistic , ↑ unimpressed ; adverb : ↑ impressively , ↑ impressionistically ; verb : ↑ impress ]
1 . someone who copies the speech or behaviour of famous people in order to entertain other people
2 . someone who uses impressionism in the paintings or music that they produce:
impressionist painters